package com.ruoyi.common.utils;

import cn.hutool.core.lang.Validator;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.StrUtil;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * JSON 工具类
 *
 * @author 芋道源码
 */
public class JsonUtils {

	private static ObjectMapper objectMapper = new ObjectMapper();

	/**
	 * 初始化 objectMapper 属性
	 * <p>
	 * 通过这样的方式，使用 Spring 创建的 ObjectMapper Bean
	 *
	 * @param objectMapper ObjectMapper 对象
	 */
	public static void init(ObjectMapper objectMapper) {
		JsonUtils.objectMapper = objectMapper;
	}

	public static String toJsonString(Object object) {
		if (Validator.isEmpty(object)) {
			return null;
		}
		try {
			return objectMapper.writeValueAsString(object);
		} catch (JsonProcessingException e) {
			throw new RuntimeException(e);
		}
	}

	public static <T> T parseObject(String text, Class<T> clazz) {
		if (StrUtil.isEmpty(text)) {
			return null;
		}
		try {
			return objectMapper.readValue(text, clazz);
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

	public static <T> T parseObject(byte[] bytes, Class<T> clazz) {
		if (ArrayUtil.isEmpty(bytes)) {
			return null;
		}
		try {
			return objectMapper.readValue(bytes, clazz);
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

	public static <T> T parseObject(String text, TypeReference<T> typeReference) {
		if (StrUtil.isBlank(text)) {
			return null;
		}
		try {
			return objectMapper.readValue(text, typeReference);
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

	public static <T> Map<String, T> parseMap(String text) {
		if (StrUtil.isBlank(text)) {
			return null;
		}
		try {
			return objectMapper.readValue(text, new TypeReference<Map<String, T>>() {
			});
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

	public static <T> List<T> parseArray(String text, Class<T> clazz) {
		if (StrUtil.isEmpty(text)) {
			return new ArrayList<>();
		}
		try {
			return objectMapper.readValue(text, objectMapper.getTypeFactory().constructCollectionType(List.class, clazz));
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

}
